Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada
Seasonal changes in water chemistry and periphytic diatom assemblages were monitored for a saline, a subsaline, and freshwater lake in the central Yukon Territory. Athalassic saline lakes, such as these, are believed to be extremely rare in arctic regions. All three study lakes exhibited a gradual s...
Published in: | ARCTIC |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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The Arctic Institute of North America
1995
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Online Access: | https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64280 |
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University of Calgary Journal Hosting |
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ftunivcalgaryojs |
language |
English |
topic |
Chemical properties Diatoms Evaporation Fresh-water biology Fresh-water ecology Lakes Plant succession Salinity Water level Pelly Crossing region Yukon |
spellingShingle |
Chemical properties Diatoms Evaporation Fresh-water biology Fresh-water ecology Lakes Plant succession Salinity Water level Pelly Crossing region Yukon Veres, Allison J. Pienitz, Reinhard Smol, John P. Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada |
topic_facet |
Chemical properties Diatoms Evaporation Fresh-water biology Fresh-water ecology Lakes Plant succession Salinity Water level Pelly Crossing region Yukon |
description |
Seasonal changes in water chemistry and periphytic diatom assemblages were monitored for a saline, a subsaline, and freshwater lake in the central Yukon Territory. Athalassic saline lakes, such as these, are believed to be extremely rare in arctic regions. All three study lakes exhibited a gradual shoreline retreat over the season (28 May to 22 August 1992) due to evaporative water loss. As the season progressed, the saline lake exhibited a marked increase in conductivity and salinity, similar to changes observed for inland salt lakes in more southern regions. The seasonal changes in water chemistry were less pronounced in the subsaline and freshwater lakes. The periphytic diatom populations of the saline lake closely tracked changes in the lake's salinity, exhibiting a successional shift from taxa with low salt tolerances (e.g., Nitzschia cf. commutata and N. cf. palea) to those with high salt tolerances (e.g., Amphora acutiuscula) over the study period. Periphytic diatoms in the subsaline and freshwater lakes also exhibited marked successional changes, shifting to almost complete dominance by a single species (Cocconeis placentula and Achnanthes minutissima respectively), but these shifts were not related to lake water salinity alone.Key words: lakes, diatoms, seasonal succession, saline, subarctic, Yukon On a observé les variations saisonnières dans la composition chimique de l'eau et les assemblages de diatomées périphytoniques, dans un lac salin, un lac subsalin et un lac d'eau douce dans le centre du Territoire du Yukon. On croit que de tels les lacs salins ne venant pas de la mer, sont très rares dans la région arctique. Les trois lacs étudiés ont tous montré un retrait du rivage dû à la perte d'eau par évaporation au cours de la saison (du 28 mai au 22 août 1992). Au fur et à mesure que la saison avançait, le lac salin montrait une augmentation marquée de conductivité et de salinité semblable à celle observée dans les lacs intérieurs salins de régions plus au sud. Les changements saisonniers dans la composition chimique de l'eau étaient moins prononcés pour les lacs subsalin et d'eau douce. Les populations de diatomées périphytoniques du lac salin variaient directement en fonction des changements de salinité du lac, montrant des changements de succession allant de taxa à faible tolérance au sel (e.g., Nitzschia cf. commutata et N. cf. palea) à des taxa à forte tolérance au sel (e.g., Amphora acutiuscala) pendant la période d'étude. Les diatomées périphytoniques dans les lacs subsalin et d'eau douce ont aussi montré des changements de succession marqués, allant jusqu'à la domination presque complète d'une seule espèce (Cocconeis placentula et Achnanthes minutissima respectivement); ces changements n'étaient cependant pas reliés uniquement à la variation de salinité de l'eau des lacs.Mots clés: lacs, diatomées, succession saisonnière, salin, subarctique, Yukon |
format |
Article in Journal/Newspaper |
author |
Veres, Allison J. Pienitz, Reinhard Smol, John P. |
author_facet |
Veres, Allison J. Pienitz, Reinhard Smol, John P. |
author_sort |
Veres, Allison J. |
title |
Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada |
title_short |
Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada |
title_full |
Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada |
title_fullStr |
Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada |
title_full_unstemmed |
Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada |
title_sort |
lake water salinity and periphytic diatom succession in three subarctic lakes, yukon territory, canada |
publisher |
The Arctic Institute of North America |
publishDate |
1995 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64280 |
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ENVELOPE(69.481,69.481,-49.288,-49.288) ENVELOPE(69.950,69.950,-49.317,-49.317) ENVELOPE(-136.581,-136.581,62.830,62.830) ENVELOPE(-111.528,-111.528,57.081,57.081) |
geographic |
Arctic Canada Lac d'Eau Douce Les Trois Lacs Pelly Crossing Saline Lake Yukon |
geographic_facet |
Arctic Canada Lac d'Eau Douce Les Trois Lacs Pelly Crossing Saline Lake Yukon |
genre |
Arctic Arctic Arctique* Pelly Crossing Subarctic subarctique* Yukon |
genre_facet |
Arctic Arctic Arctique* Pelly Crossing Subarctic subarctique* Yukon |
op_source |
ARCTIC; Vol. 48 No. 1 (1995): March: 1–108; 63-70 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64280/48215 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64280 |
container_title |
ARCTIC |
container_volume |
48 |
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1 |
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1766290758313181184 |
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/64280 2023-05-15T14:19:10+02:00 Lake Water Salinity and Periphytic Diatom Succession in Three Subarctic Lakes, Yukon Territory, Canada Veres, Allison J. Pienitz, Reinhard Smol, John P. 1995-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64280 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64280/48215 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/64280 ARCTIC; Vol. 48 No. 1 (1995): March: 1–108; 63-70 1923-1245 0004-0843 Chemical properties Diatoms Evaporation Fresh-water biology Fresh-water ecology Lakes Plant succession Salinity Water level Pelly Crossing region Yukon info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1995 ftunivcalgaryojs 2022-03-22T21:21:32Z Seasonal changes in water chemistry and periphytic diatom assemblages were monitored for a saline, a subsaline, and freshwater lake in the central Yukon Territory. Athalassic saline lakes, such as these, are believed to be extremely rare in arctic regions. All three study lakes exhibited a gradual shoreline retreat over the season (28 May to 22 August 1992) due to evaporative water loss. As the season progressed, the saline lake exhibited a marked increase in conductivity and salinity, similar to changes observed for inland salt lakes in more southern regions. The seasonal changes in water chemistry were less pronounced in the subsaline and freshwater lakes. The periphytic diatom populations of the saline lake closely tracked changes in the lake's salinity, exhibiting a successional shift from taxa with low salt tolerances (e.g., Nitzschia cf. commutata and N. cf. palea) to those with high salt tolerances (e.g., Amphora acutiuscula) over the study period. Periphytic diatoms in the subsaline and freshwater lakes also exhibited marked successional changes, shifting to almost complete dominance by a single species (Cocconeis placentula and Achnanthes minutissima respectively), but these shifts were not related to lake water salinity alone.Key words: lakes, diatoms, seasonal succession, saline, subarctic, Yukon On a observé les variations saisonnières dans la composition chimique de l'eau et les assemblages de diatomées périphytoniques, dans un lac salin, un lac subsalin et un lac d'eau douce dans le centre du Territoire du Yukon. On croit que de tels les lacs salins ne venant pas de la mer, sont très rares dans la région arctique. Les trois lacs étudiés ont tous montré un retrait du rivage dû à la perte d'eau par évaporation au cours de la saison (du 28 mai au 22 août 1992). Au fur et à mesure que la saison avançait, le lac salin montrait une augmentation marquée de conductivité et de salinité semblable à celle observée dans les lacs intérieurs salins de régions plus au sud. Les changements saisonniers dans la composition chimique de l'eau étaient moins prononcés pour les lacs subsalin et d'eau douce. Les populations de diatomées périphytoniques du lac salin variaient directement en fonction des changements de salinité du lac, montrant des changements de succession allant de taxa à faible tolérance au sel (e.g., Nitzschia cf. commutata et N. cf. palea) à des taxa à forte tolérance au sel (e.g., Amphora acutiuscala) pendant la période d'étude. Les diatomées périphytoniques dans les lacs subsalin et d'eau douce ont aussi montré des changements de succession marqués, allant jusqu'à la domination presque complète d'une seule espèce (Cocconeis placentula et Achnanthes minutissima respectivement); ces changements n'étaient cependant pas reliés uniquement à la variation de salinité de l'eau des lacs.Mots clés: lacs, diatomées, succession saisonnière, salin, subarctique, Yukon Article in Journal/Newspaper Arctic Arctic Arctique* Pelly Crossing Subarctic subarctique* Yukon University of Calgary Journal Hosting Arctic Canada Lac d'Eau Douce ENVELOPE(69.481,69.481,-49.288,-49.288) Les Trois Lacs ENVELOPE(69.950,69.950,-49.317,-49.317) Pelly Crossing ENVELOPE(-136.581,-136.581,62.830,62.830) Saline Lake ENVELOPE(-111.528,-111.528,57.081,57.081) Yukon ARCTIC 48 1 |